Analysis and improvement measures of defective coal gangue fired brick

According to the phenomenon of the accident of defective products of finished bricks, combined with fuzzy mathematics and fault tree analysis theory, the causes of the accident are studied. Firstly, the downward method is used to analysis the structure of fault tree and the influence degree of each basic event on the defective top event of finished brick is sorted. Secondly, the trigonometric fuzzy function is used to normalize the probability value of the basic event collected and the probability value of the basic event without statistical data obtained by the expert scoring. The importance of the processed triangular fuzzy probability is quantitatively analyzed and compared and the main factors affecting the top event are obtained. Finally, specific and targeted suggestions are put forward according to the factors causing the top event.